Cause for Polaris backup valve not cycling

[texpilot]

Hi, and welcome to the forum!!

I have a Polaris 380, and the only time I experienced the steady stream of water from the backup valve, a new one fixed the problem. It only takes a tny crack to cause a problem--have you inspected the new one to make sure it wasn"t alreadycracked or damaged in some way when you bought it?

Hi Janet,
It came in a factory sealed bag, packaged well in the shipping box with plenty of air packing. I can't imagine it was already broken. I'm wondering if it could be a pressure thing, as in too much pressure? I don't know how to check for that. Still searching ...